The LM386 is a power amplifier designed for use in low voltage consumer applications. The gain is internally set to 20 to keep external part count low, but the addition of an external resistor and capacitor between pins 1 and 8 will increase the gain to any value up to 200.
Brand: UTC.

The LM386 is a power amplifier designed for use in low voltage consumer applications. The gain is internally set to 20 to keep external part count low, but the addition of an external resistor and capacitor between pins 1 and 8 will increase the gain to any value up to 200..

The TDA2030A is a monolithic IC in Pentawatt package intended for use as low frequency class AB amplifier.
With VS max = 44V it is particularly suited for more reliable applications without regulated supply and for 35W driver circuits using low-cost complementary pairs.
The TDA2030A provides high output current and has very low harmonic and cross-over distortion..

The TDA 2050 is a monolithic integrated circuit in Pentawatt package, intended for use as an audio class AB audio amplifier.
Brand: ST Microelectronics.

CD4440 (LA4440) - 14-Pin, 6W 2-Channel, Bridge 19W typ Power Amplifier IC.
Supply Voltage: 8.0V to 16.0V DC..

CD6283CS – 4.6W Per Channel - Dual Audio Power Amplifier IC – FSIP-12H Package..

The TDA7294 is a monolithic integrated circuit in Multiwatt15 package, intended for use as audio class AB amplifier in Hi-Fi field applications (Home Stereo, self powered loudspeakers, Topclass TV).
Brand: ST Microelectronics..